Saw-swage



(No Model.) 2 Sheets-Sheet 1. M. OOVEL.

SAW SWAGB.

No. 278,684. Patented June 5,1883.

N. PEYERS; Pnm-uinu nwwr, Washhgton. a. c.

2 Sheets-Sheet 2. M. OOVEL.

SAW SWAGE.

Patented June 5, 1883.

(No Model.)

INVEN B ,Ww w/M s x l n PhnloLimogrzphor, Wahin bon. n. a

UNITED STATES.

PATENT OFFICE.

MILO OOVEL, or cnreneo, ILLINOIS.

sAw-swAeEP SPECIFICATION forming part of Letters Patent No. 278,684,dated June 5, 1883, 1

Application filed April 18, 1882. (No model.)

To all whom it may concern:

Be it known that I, MILO GOVEL, of Chicago, in the county of Cook andState of Illinois, have invented certain new and useful Improvements ina Saw-Swage; and I do hereby de clare the following to be a full, clear,and exact description of the invention, that will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, forming a part of this specification.

This invention relates to improvements in devices for drawing out andspreading the points of saw-teeth; and it consists of certain novelfeatures in the construction, arrangement, and operation of the severalparts, as will be hereinafter more fully set forth in detail, andpointed out in the claims.

Figure 1 is an elevation showing the front side of a device embodying myimprovements. Fig. 2 is a view with the front plate removed, showing theinterior arrangement of the mechanism and relative position of the saw;Fig. 3, a view of the back side; Fig. 4, a top or edge view; Fig. 5, anend view; Fig. 6, a vertical transverse section in the plane 6 6, Figs.2 and 4-; Fig. 7, a detached view of the upper die. Figs. 8 and 9 showthe different shape or form which may be given to the points of theteeth by this device.

Referring to the drawings, A represents the front plate, and A the backplate, which are bolted together to form the body proper for the supportof the operating mechanism. These plates are of an irregular shape, andare 1101- lowed out on the interior to form the recess (1, (shown inFig. 6 of the drawings,) the edges having a close bearing, as shown inFigs. 4 and 5 of the drawings. The opposite end of the body from the operating-handle A is provided with the slot a for the insertion of thesaw A as shown in Fig. 4 of the drawings.

The shaft B passes through the body of the device, the outer projectingend being provided with the crank or handle A", while the oppositeprojecting end is provided with the camdisk B. This cam-disk is cut awayin the manner shown in Fig. 4 of the drawings. On

that part of the shaft B between the plates A A is placed the cam Bshown in Figs. 2 and 7 straight dress.

6 of the drawings. This cam has frictional contact with the hook end ofthe eccentric lever 0, the opposite end having formed integral therewiththe bearing-pin B projecting from each side, and having bearings in the.parts A A. This end of the lever O is recessed, as indicated by thedotted lines in Fig. 2, for the reception of the upper die, 0, theslightlyprojeeting end of which is shown in Fig. 7 of the drawings; Thisdie is adjusted by means of the set-screw (6, the outer face or plate,A, being provided with the aperture B*, (shown in Fig. 1,) for thepurpose of giving access to the adjusting-screwa The lower die consistsof the round pin 0 the ends of which are secured in the two partscomposing the body of the device by means of the set-screws a at, whichprevent the same from changing its position.

The saw is securely held in position, during the process of swaging theteeth, by means of the clamping-bolts C O, which effectually prevent thesaw from backing out when the" dies are brought together. Theseclampingbolts also serve as a gage to spread the tooth more,on one sidethan on the other, or to dress a straighttooth. This is done by simplyturning in or out the clamping bolts, so as to throw the point of thetooth a little beyond either side of the upper die or retain the toothin the center of the die, so as to produce a The different forms ofteeth capable of being produced by this device are shown in Figs. 8 and9 of the drawings.

The lower die, C", being round in form, imparts to the tooth the hookshape shown in Fig. 8 of the drawings. A. greater or less amount of hookmay be given the tooth, as may be required, by moving ,the lower part ofthe saw in or out, the exact proportion being gaged by means of theadjustable guide 1), against the end of which one of the saw-teethshould rest.

The clamping-bolt 0* passes through the opposite or long end of thelever is providedwith the rotating beveled roller 1)", which has bentaround the same, the bottom of the V' frictional contact with thecam-disk B. As the cam B is rotated an. oscillating movement is impartedto the lever D, which serves to bring the clamping-bolt O in contactwith the saw at the proper time. is also provided with the V-shapedspring d,

having contact with the clamping-bolt, while the ends are somewhatextended, bent over at right angles, and secured in the back plate, A,as shown in Fig. 3 of the drawings. This spring is retained in place onthe clampingbolt by means of the pin (1'' inserted in the clamping-boltC, and which serves to assist in returning these parts to a normalposition. The mechanism does not make a complete revolution, but about aone-half turn in. the plane of revolution.

As shown in Fig. 1 of the drawings, the handle is in a normal position.The operator, taking hold of it, moves the same inward and downward, sothat it stands at about the opposite point. This movement brings thethickest part of the cam B in contact with the inner and under side ofthe back end of the eccentric lever G, forcing this end upward andcausing a downward movement of the opposite end, which carries the upperdie, 0, and bringing the same in contact with the tooth of the sawinserted between the dies. This same movement brings the thickest partof the cam B underneath the beveled roller 1)", raising this end of thelever D, lowering the opposite end, and bringing the clamping device incontact with the saw. These cams are set on the shaft B with referenceto each other, so as to bring the clamp in contact with and fasten thesaw before the dies are brought to a bearing on the tooth, and as theoperating-handle is returned to a normal position the saw is releasedfrom both the clamp and dies and is ready to be moved so as to bringanother tooth in position to be operated upon. By this arrangement anautomatic movement is imparted to these parts.

The device should be secured. to an upright This clamping-bolt post bymeans of bolts passing through the apertures (1 d This device is adaptedfor either straight or circular saws. g

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination, with the eccentric lever 0, provided with. the pin Bprojecting from each side at right angles, of the adjustable die 0,recessed into the front end of the eccentric lever, substantially as setforth.

2. The combination, with the inner hook end oft-he eccentric lever O, ofthe cam B, the shaft B, and the operating-handle A, whereby the upperdie is brought in contact with the saw tooth resting on the lower orstationary die, substantially as set forth.

3. In a saW-swage as described, the round stationary die 0*, whereby agreater or less amount of hook is given to the saw-tooth, as may bedesired, substantially as described.

at. The combination, with the operating-shaft B, of the cam- B, thebeveled friction-roller b, and the oscillating lever D, provided withthe bearing-pin b, substantially as described.

5. The combination, with the clamps C" C, of the plates A A, the spring(I, the pin (1, and the oscillating lever D, provided with the pin 1),having bearings in the lugs I) 1)", sub stantially as described.

6. In a saw-swage as described, the combination of the followingelements, consisting, essentially, of the two plates, A A, bolted together and provided with the interior recess, a, the operating-shaft B,the cam B", the eccentric lever G, the upper adjustable die, 0, thelower stationary round die, 0 the clampingbolts C C, the oscillatinglever D, and the cam B, all constructed, arranged, and operatingsubstantially as described.

MILO COVEL,

\Vitnesses L. M, FREEMAN, L. B COUPLAND.

